You could also check out CS - they're always looking for players. There's coed too...
http://www.couchsurfing.org/group_read.html?gid=1315&post=7324327
Hey Camila!
If you are interested, let's hook up. I am a 29 year from the US (Minnesota) that has been living here for almost a year now with my fiance. My castellano is pretty good, so I can help you with yours, and would also love a break from it every now and then :)
un beso!
Chelsea
Hey ladies! I too am an expat living in Baires from Minneapolis, MN, moved here 10 mths ago. I'll be making a long visit to the hometown (3 wks), but returning to Baires the last week in August. I would love to make more connections!!